PHP

PHP extension options and configuration information. these functions allow you to obtain many PHP parameters, such as runtime configurations, loaded extensions, and versions. You will also find the function that sets the PHP option in your running

PHP extension-output buffer control Introduction When PHP scripts have output, the output control function can use these to control the output. This is useful in many different situations, especially when the script starts to output data, it sends

The garbage collection mechanism of PHP features-Factors to be considered in performance may affect the performance slightly, but it is only available when comparing PHP 5.2 with PHP 5.3. Although in PHP 5.2, the root of the record may be slower

Php array learning array: a set of keywords and values. The same php array can store multiple values of different data types. the array subscript can be used to create an array from scratch: (1) $ arr [0] 1; array element $ arr [1] 2.8 ;...... (2) $

PHP features permanent database connection refers to the connection that is not closed when the script ends running. When receiving a permanent connection request. PHP will check whether there is already a permanent connection (previously enabled.

PHP features using remote HTTP file and FTP file operations only in php. if the allow_url_fopen option is activated in the ini file, HTTP and FTP URLs can be used in most functions that require file names as parameters to replace file names. You can

Split into thousands of parts for sorting and merging. First, create a txt file with 0.1 billion QQ numbers. PHPcode split into thousands of parts for sorting and merging. First, create a txt file with 0.1 billion QQ numbers. PHP code? //

PHP features-session mechanism-the use of cookies in PHP transparently supports HTTP cookies. Cookie is a mechanism for storing data in a remote browser and tracking and identifying users. You can use the setcookie () or setrawcookie () function to

* ** Calculate the length of a string (Chinese characters are calculated based on two characters) ** @ paramstring $ str string ** @ returnint * functionmyStrLen ($ str) {$ lengthstrlen (preg_replace ([\ x00-\ x7F], $ str); if ($ length ){... /** *

PHP features: the HTTP authentication mechanism of PHP for HTTP authentication is only valid when PHP runs in Apache module mode. Therefore, this function is not applicable to CGI versions. In the PHP script of the Apache module, you can use the

Php lottery probability algorithm /** The lottery drawing principle with different probabilities is to divide the 0 to * (total proportion) intervals based on the proportion of the entire item, then, the random number seed is used to generate a

PHP Security error reports are a double-edged sword for PHP Security. On the one hand, it can improve security and on the other hand, it is harmful. The common method used to attack the system is to input incorrect data and view the error message

PHP-based protocols and encapsulation protocols supported by PHP include many built-in URL-style encapsulation protocols, which can be used for encapsulation such as fopen (), copy (), file_exists (), and filesize () file system functions. In

PHP Basics pre-defined exceptions 1. Exception (PHP 5> = 5.1.0) Introduction Exception is the base class of all exceptions. Method Exception: :__ construct-Exception constructor Exception: getMessage-get Exception message content Exception:

PHP has predefined 9 Super global variables, 8 Magic variables, and 13 magic methods during design. these variables and functions can be used anywhere in the script without being declared. These variables and functions are frequently used in PHP

PHP-based reference explanation-reference transfer and return reference transfer A variable can be passed to the function through reference, so that the function can modify the value of its parameter. Syntax: Note that there is no reference

Require () and require_once (): the same file is called only once and is usually placed at the beginning of the PHP program. before the PHP program is executed, read the file specified by require first. If an error occurs, it is fatal. Include ()

& Amp; lt ;? Php * array traversal ** 1. use the for statement to traverse the array cyclically *. other languages (only this method) * B. in PHP, this method is not our preferred method * c. the array must be an index array, and the subscript must

For general anti-injection, you only need to use the php addslashes function. $ _ POSTsql_injection ($ _ POST); $ _ GETsql_injection ($ _ GET); functionsql_injection ($ content) {if (! Get_magic_quotes_gpc () {if (I... general anti-injection, you

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